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<Title>Adaptable Predicate</Title>
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<H1>Adaptable Predicate</H1>

<Table CellPadding=0 CellSpacing=0 width=100%>
<TR>
<TD Align=left><Img src = "functors.gif" Alt=""   WIDTH = "194"  HEIGHT = "38" ></TD>
<TD Align=right><Img src = "concept.gif" Alt=""   WIDTH = "194"  HEIGHT = "38" ></TD>
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<TR>
<TD Align=left VAlign=top><b>Category</b>: functors</TD>
<TD Align=right VAlign=top><b>Component type</b>: concept</TD>
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</Table>

<h3>Description</h3>
An Adaptable Predicate is a <A href="Predicate.html">Predicate</A> that is also an
<A href="AdaptableUnaryFunction.html">Adaptable Unary Function</A>.  That is, it is a <A href="UnaryFunction.html">Unary Function</A>
whose return type is <tt>bool</tt>, and that includes nested <tt>typedef</tt>s that
define its argument type and return type.  
<h3>Refinement of</h3>
<A href="Predicate.html">Predicate</A>, <A href="AdaptableUnaryFunction.html">Adaptable Unary Function</A>
<h3>Associated types</h3>
None, except for those associated with <A href="Predicate.html">Predicate</A> and
<A href="AdaptableUnaryFunction.html">Adaptable Unary Function</A>.
<h3>Notation</h3>
<h3>Definitions</h3>
<h3>Valid expressions</h3>
None, except for those defined by the <A href="Predicate.html">Predicate</A> and
<A href="AdaptableUnaryFunction.html">Adaptable Unary Function</A> requirements.
<h3>Expression semantics</h3>
<h3>Complexity guarantees</h3>
<h3>Invariants</h3>
<h3>Models</h3>
<UL>
<LI>
<tt><A href="logical_not.html">logical_not</A></tt>
<LI>
<tt><A href="unary_negate.html">unary_negate</A></tt>
</UL>
<h3>Notes</h3>
<h3>See also</h3>
<A href="Predicate.html">Predicate</A>, <A href="BinaryPredicate.html">Binary Predicate</A>, <A href="AdaptableBinaryPredicate.html">Adaptable Binary Predicate</A>

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